- 504

- 6

http://www.phy.uct.ac.za/people/horowitz/Teaching/lecturenotes.pdf

in section 2 it is described transition from Poisson bracket into Canonical Commutation Relations.

But it is written

*The experimentally observed phenomenon of incompatible measurements suggests that position and momentum cannot be*

**number-valued functions**in QM.What means "

**number-valued functions**"?

I understand QM, but I do not understand this word, what he want to tell with it.